Fix source mapping of generated cache wrapper calls (#74987)
In the SWC transform we're now using the span of the original `"use cache"` function for the generated cache wrapper call, e.g. so that the captured timeout error stack can be source mapped correctly.
This also fixes the wrongly placed `/*#__TURBOPACK_DISABLE_EXPORT_MERGING__*/` marker for the generated
cache wrapper statements.
**Before:**
<img width="1496" alt="404215955-c354d1f5-4aeb-4f35-9385-a9531219dc4c" src="https://github.com/user-attachments/assets/34d1863a-d557-419f-8477-577bd759341b" />
**After:**
<img width="1496" alt="404215977-a0157fad-a1f8-409a-b9b9-9709e07f7c05" src="https://github.com/user-attachments/assets/f00b7776-6674-4714-b425-d0de994abbff" />
Closes NDX-675
